Frame for wire mats



(No Model.)

0. G. HILL.

FRAME FOR WIRE MATS. No. 366,098. Patented July 5,1887.

W E Mn '11:: 'mm w W WITNESSES v IN VI tNT OR A? ,MJW 4 UNITED STATES PATENT OEEICE.

CHRISTIAN O. HILL, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE HARTMAN STEEL COMPANY, (LIMITED,) OF BEAVER FALLS, PENNSYLVANIA.

FRAME FOR WIRE MATS.

SF'ECTPI'CA'TION forming part of Letters Patent No. 366,098, dated July 5, 1887.

Application filed December 3], 1856. Serial No. 2523,0Sl5. (Np model.)

To all whom, it may concern.-

Be it known that I, CHRISTIAN O. HILL, a

citizen of the United States, residing at Ohicage, Cook county, State of Illinois, have in- 5 vented certain new and useful Improvements in Frames for WVire Mats, of which the following is'a specification.

The object of my invention is to provide a light, strong, durable, and compact metallic IO frame for wire mats, of such construction that the wire can be firmly secured thereto by twisting without the aid of staples and the like, which is free from any danger of loosening or wearing away in use, and which, if desired, enables one to dispense with abraee-rod usually employed in mats of this description.

One form of my improved wire-mat frame is shown in the accompanying drawings, in which Figure 1 is a plan view of the frame and showing a portion of the mat in one corner, parts of the frame being cut away to show the method ofsecuring the mat to the frame. Fig. 2 is a side elevation of the frame, part being cut away to show the method of fastening, as in Fig. 1. Fig. 3 is an end view showing the frame, partly in section and partly in elevation, beforethe mat is secured to the same.

The same letters indicate similar parts in 0 the various figures.

A is the frame; B, the wire constituting the mat. Of course the form of weaving of mat B constitutes no part of my invention, and any woven-wire mat may be used with my im- 5 proved frame when properly secured thereto. The frame A consists,primarily,of two pieces of metal-an outer frame or shield, C, Fig. 3, and an inner frame, D. This inner frame is a plain strip of metal of suitable width running 40 all way round the mat, and is made, preferably, slightly concave on its outer side, and provided with slots a, which admit the auxiliary wire I), by which the mat is secured to the frame. The depth of these slots a is pro- 4 5 portioned to the size of the wire I), so that the latter is sufficiently sunk therein to prevent any friction coming upon said wire when the mat is trodden upon. This auxiliary wire is passed through one of the loops of the mat B, and the two ends then twistedtogether, as shown in Fig. 2, and bent so that they rest in the space formed by the concave surface of the inner frame, D, and the inner surface of the outer frame or shield, O. y

I will state here that the essential feature is that space enough should be given between outerframe, O, and inner frame, D, to hold these twisted ends without undue pressure from either direction; but this space can be attained either by having outer frame, C, concave and inner frame, D, straight, or inner frame, D, concave and outer frame, 0, straight, or both concave, without departing from the spirit of my invention. Both surfaces might also be straight and separated by 6 5 the required space, if desired, but the frame would not be quite so solid, compact, and durable as when made in the form suggested, as the presence of a slight curve in one or both of the metallic pieces constituting the frame enables the latter to expand with an increase of temperature without separating the joint or clutch of the two pieces. The outer frame,

C, is a continuous piece of wrought metalbent around the top and bottom of the inner frame, as shown in Fig. 3, and by presentingasrnooth and uniform surface above and below protects the inner frame absolutely from wear and friction when in use.

The advantages of my improved mat are, I think, obvious without further description.

I claim The above-described wire-mat frame, which consists of an inner frame, around which the fastening-wire is twisted and held, and an outer frame whose edges are bent round the inner frame in such manner as to act as a shield for the same, as herein described, and for the puposes specified.

CHRISTIAN O. HILL.

Witnesses;

NELSON B. WILLIAMs, FRANK R. HARTMAN. 

